The sensor needs a master clock, handle it explictly in the driver.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/i2c/mt9t001.c | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)
diff --git a/drivers/media/i2c/mt9t001.c b/drivers/media/i2c/mt9t001.c
index 9a0bb06..422e068 100644
--- a/drivers/media/i2c/mt9t001.c
+++ b/drivers/media/i2c/mt9t001.c
@@ -12,6 +12,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/log2.h>
#include <linux/module.h>
@@ -118,6 +119,7 @@ struct mt9t001 {
struct v4l2_subdev subdev;
struct media_pad pad;
+ struct clk *clk;
struct regulator_bulk_data regulators[2];
struct mutex power_lock; /* lock to protect power_count */
@@ -189,9 +191,21 @@ static int mt9t001_reset(struct mt9t001 *mt9t001)
static int mt9t001_power_on(struct mt9t001 *mt9t001)
{
+ int ret;
+
/* Bring up the supplies */
- return regulator_bulk_enable(ARRAY_SIZE(mt9t001->regulators),
- mt9t001->regulators);
+ ret = regulator_bulk_enable(ARRAY_SIZE(mt9t001->regulators),
+ mt9t001->regulators);
+ if (ret < 0)
+ return ret;
+
+ /* Enable clock */
+ ret = clk_prepare_enable(mt9t001->clk);
+ if (ret < 0)
+ regulator_bulk_disable(ARRAY_SIZE(mt9t001->regulators),
+ mt9t001->regulators);
+
+ return ret;
}
static void mt9t001_power_off(struct mt9t001 *mt9t001)
@@ -199,6 +213,9 @@ static void mt9t001_power_off(struct mt9t001 *mt9t001)
regulator_bulk_disable(ARRAY_SIZE(mt9t001->regulators),
mt9t001->regulators);
+ clk_disable_unprepare(mt9t001->clk);
+}
+
static int __mt9t001_set_power(struct mt9t001 *mt9t001, bool on)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9t001->subdev);
@@ -854,6 +871,12 @@ static int mt9t001_probe(struct i2c_client *client,
return ret;
}
+ mt9t001->clk = devm_clk_get(&client->dev, NULL);
+ if (IS_ERR(mt9t001->clk)) {
+ dev_err(&client->dev, "Unable to get clock\n");
+ return PTR_ERR(mt9t001->clk);
+ }
+
v4l2_ctrl_handler_init(&mt9t001->ctrls, ARRAY_SIZE(mt9t001_ctrls) +
ARRAY_SIZE(mt9t001_gains) + 4);
--
1.8.3.2
--
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